Quantize doesn't work.

To use the Quantize feature in the PRO DJ LINK network, you'll need grid information of the track from the DJ player.
In this case, the [PLAYER No.] of the DJ player and the connected channel number must match.

For details, see the PRO DJ LINK Setup Guide.
You can find the PRO DJ LINK Setup Guide [here].

Note: You can't use the Quantize feature if the track being played on the DJ player hasn't been analyzed by rekordbox.